Air suction control means



De.22, 1936. Ahum/DL C '2,064,871

AIR sUcTIoN CONTROL MEANS Filed Feb, 8, 1936 INVENTORy Bruno BY ATTORNEY Patented Dec. 22, 1936 UNITED STATES PATENT OFFICE Z Claims.

This invention relates to air suction control means and more particularly to an air port closure means for shoe repair machine dust intakes and the like.

' When an operator is working on dust creating machines that are equipped with a dust evacuating means, such as those used in shoe repair Work and the like, the conventional equipment has a plurality of dust creating tools, each with Iits dust intake aperture, and the dust intake apertures are all open simultaneously during the operation of the machine altho the operator works on but one tool at a time. The dust removing air blast is unnecessarily and uselessly dissipated thru these open and unused dust apertures.

An object of the present invention is to provide a dust aperture closure means that operates to close one set of dust intake apertures when the operation of the tools connected with that set of apertures is stopped, and to open that set of apertures when the tools are again started in motion.

Another object is to provide a means whereby jan air pressure for the removal of dust and the like during the operation of sets of tools on the machine, may be conserved when the separately operated sets of tools are not in motion.

Another object is to provide an air port clo- `sure means that is of simple and positive action and that is adapted for tting closely into position.

A further object is to provide an air port closure means that is simply and easily installed and that operates Without care or attention.

With the above and other objects in view, which will be readily apparent from the following detailed description, the present invention consists in simple constructions and combina- `tions of parts which will be readily understood by those skilled in the art to which the invention appertains.

In the accompanying drawing, which illustrates suitable embodiments of the invention:

" Fig. 1 is a front elevation of a shoe repair machine that embodies an application of the invention;

Fig. 2 is a section taken along the line 2-2 of Fig. 1;

Fig. 3 is an enlarged view, partly in section, of the dust aperture closure means operatively connected with the starting handle portions of the machine that is shown in Fig. 1;

Fig. 4 is an enlarged rear elevation of a fragment of the air and dust conducting pipe and viewed from the line 4 4 of Fig. 3;

Fig. 5 is an enlarged view, partly broken away, of the dust aperture closure means shaft support that is positioned within the air and dust conducting pipe;

Fig. 6 is an enlarged front view of sections ofthe dust and air conducting pipe with dust aperture closure means mounted therein and viewed from the line 6 6 of Fig. 3;

Fig. 7 is an enlarged end View, partly in section of a modied link connection with the clutch fork;

Fig. 8 is an enlarged front elevational view, with parts broken away, of the closed end of the air and dust conducting pipe;

Fig. 9 is a section, with parts broken away, that is taken along the line 9--9 of Fig. 8; and

Fig. l0 is a front fragmentary elevation of a hand operated modication of means for operating the dust aperture closure means.

In the shoe repair machine that has been chosen as being illustrative of an installation of the present invention, the supports I carry the dust and air conducting pipe 2, that is evacuated by a fan that is positioned Within the fan housing 3 and that is driven thru the belt 4 by the power driven shaft 5.

The end cap 6 closes the low pressure end of the pipe 2, into which blasts of atmospheric air are drawn thru circumferentially spaced pluralities of apertures 1, that serve to withdraw dust that is created by the application of shoe parts to the plurality of revolving tools B, when the handle 9 is lifted to put the link I0 and the fork I I in thrust to engage the clutch I2 with the power driven shaft 5 and start the belt I3.

In a similar manner, air blasts enter the plurality of apertures I4, that are spaced longitudinally of the pipe 2 in registered relation with a plurality of tools I5, that are mounted on the common shaft I6. The dust receiving apertures- I4 carry away the dust that is given oi from the use of the tools I5.

The shaft I6 is driven by the belt I'I when the handle I8 is lifted. When the handle I8 is lifted, the link I9 and the fork 20 are placed in thrust, which causes the movement of the belt I1 by the engagement of the clutch 2| with the driven Shaft 5.

The majority of these machines are operated by one individual and when the tools I5 are inactive and the tools 8 are in use, the air draft from the plurality of dust apertures I4 is so great that the air blasts thru the dust apertures 'I are inadequate to carry away the dust from the tools 8. In a similar way, when the tools 8 are inactive the air blasts thru the dust apertures I4 are inadequate.

The present invention, in many installations, will also permit the use of a low power, inexpensive fan within the fan housing 3 where a high power, more expensive fan has been required heretofore.

The dust aperture closure means for a plurality of dust apertures that are spaced longitudinally of the pipe 2, comprises a shaft 22 that is rigidly held at the substantial center of the pipe 2 by a plurality of preferably tubular bearing supports 23 that carry the bearings 24, in which the shaft 22 is journalled.

The bearings 24 are preferably apertured, as at 25, for the passage of oil therethru. Each bearing 24 preferably carries a plurality of bearing supports 23 in angular relation with each other to imparty rigidity to the mounting.

The bearing supports 23 are secured to the pipe 2 in any suitable manner, as by being threaded internally for the reception of the headed bolt 26, that may be removed for oiling or, may be replaced by a conventional apertured oil fitting, if desired.

The dust aperture closure plate 2l is curved to be substantially of the same radius as the pipe 2, and is preferably mounted-on a plurality of radially extending plate supports 28, that converge centrally of the pipe 2 in a studded collar 29 that is rigidly mounted 0n the shaft 22 in any suitable manner, as by being welded thereto.

The studded collar 29 is preferably drilled and tapped for making threaded engagement with the rod 3l, that passes thru` a ciroumferentially extending slot in the pipe 2. The cover plate 32 is preferably positioned outwardly of the pipe 2 to slidably cover and close the slot therein and is rigidly and removably secured to the rod 3i in any suitable manner, as by means of the pin 30 that passes therethru.

The rod 3| is operated by the handle I8 thru the link 33, that is disposed therebetween. The link 33 is rotatably pinned at its opposite ends to the rod 3l and to the handle I8. The handle I8 is pivotally mounted on the adjustable handle support 34, that is locked in position by the lock bolt 35 on the pipe 36, that extends longitudinally of the machine frame.

In the form of the device that is shown in Fig. 7, the dust aperture closure plate 31 is carried by the plate-support 38 that extends radially of the pipe 2 and is rigidly mounted on the shaft 22, as by being welded thereto.

The end of the shaft 22 is bent to provide a lever arm 39, that is of suitable length to substantially fully open and close the dust aperture that may be covered by the movable closure plate 31. The lever arm 39 is preferably journalled thru an eye formed at the end of the link 49. The link 40 passes thru an aperture in the pipe 2, that is covered by the cover means 4I, that may be of felt or other suitable material. In this construction, the link 49 extends down to the fork 29 to Which it is secured by the bolt and nut 42.

In the case of a plurality of circumferentially disposed dust apertures, as is shown in Figs. 8 and 9 of the drawing as being at the low pressure end of the pipe 2, the dust aperture closure plates 43 and 44 are carried by pairs of radially disposed plate supports 45 and 45, respectively, thatI have radially inner ends rigidly secured to the shaft 22a in any suitable manner, as by being welded thereto.

A hand operated plate operating means is shown in Fig. l0, of the drawing, wherein the shaft 41 is in rigid engagement with the studded collar 48, that is tapped for its threaded engagement with the threaded end of the spring metal rod 49. The rod 49 extends to externally of the pipe 2.

The pipe 2 is slotted to permit the motion of the rod 49 circumferentially thereof. The closure plate 59, that is removably secured to the rod 49, in a suitable manner, as by the pin 5I that passes thru a portion thereof and thru the rod, serves to close the pipe slot.

Detents 52, one at either end of the pipe slot, prevent motion of the spring rod 49, from its set positions from machine vibrations and the like.

End -play in the shaft 4l', due to the action of the spring rod 49, is compensated for by the thrust collar 53, that is rigidly secured to the shaft 4l by Welding or the like, and that bears against the bearing. 24.

It is to be understood that the particular embodiments of the invention that are shown and described herein, are shown forpurposes of illustration and explanation and that various modifications in the constructions and the uses that are shown and-described, may be made Without departing from the invention as dei-ined in the appended claims. i

What I claim is:

1. An air control means, comprising a substantially cylindrical and partly exacuated pipe having an intake aperture, a closure plate curved to a radius substantially conforming t'o that of said pipe and making sliding engagement with said pipe for closing said pipe intake aperture, a shaft disposed substantially centrally of and extending longitudinally of said pipe, a plate support interposed between said closure plate and said shaft and having separate portions rigidly secured to said closure plate and said shaft, a rod having a portion removably secured to said shaft, and shaft operating means accessible from out- Wardly of said pipe and applied to a portion of said rod.

2. An air suction control means, comprising a substantially cylindrical dust and air conducting pipe that is apertured for the admission of dust into the interior of said pipe, a` shaft extending longitudinally of said pipe and disposed along substantially the center thereof, a bearing in which said shaft is journalled, a bearing support maintaining said bearing in substantially fixed relation with said pipe, a dust aperture closure plate curved to substantially conform with the radius of said pipe, a plate support rigidly secured at one' end to said plate and at the opposite Vend-to said shaft, and means rextending to externally of said pipe for causing the rotation of said shaft.

BRUNO ANGRADI. 

